Oil can



S. HARRIS Oct. 29, 1929.

OIL CAN Filed Oct. 6, 1927 Fig.4.

Inn awry Patented Oct. 29, 1929 I ED STATES SAMUEL HARRIS, OI BRUOE'ROCK,

WESTERN AUSTRALIA, AUSTRALIA,

oIn CAN 2 Application and October 6, 1927, Serial No. 224,477, an inname we 2, 1927i This invention relates to an improved oil can. i Theoil can is of the for'ce-teedtype for delivering oil under pressure. J

The invention consists broadly inthe use i of a plunger that, whilstmoving in a cylin' der,.turns to an extent that alternately openssuction and discharge ports communicating with the oil reservoir andwith the discharge spout.

There are other features of novelty that will appear as the descriptionproceeds.

The invention will readily be. understood by reference to theaccompanying drawings, in which Figure 1 is a sectional side elevationof the assembled oil can. i

Fig. 2 is a part sectional elevation of the cylinder, plunger, andappurtenant parts.-,

, Fig. 3 is another part sectional view of the 20 parts shown in Fig. 2,but shown at 90 thereto. In this case the plunger'is at the top of itsstroke.

Fig. 4 is a similar view to Fig. 3, except that the plunger is at thebottom of its stroke, and I Fig. 5 is an enlarged in the cylinder andthe guide pin working therein.

As shown in the drawings, an oil can 1.0 of appropriate shape has acylinder 11 in juxtaposition thereto, such cylinder being provided witha suction port 12 and with a discharge port 13, the first leading by anappropriate passage 14 to the oil sump or reservoir, whilst the latterby a passage 15 communicates with a discharge spout 16. Working insidesuch cylinder is a hollow plunger 17, open at one end and closed at theother. Such plunger is provided'with appropriate openings or ports 18and 19, adapted to register respectively with the suction port 12 andwith the discharge port 13 of the cylinder. A spring 20 registersagainst the closed ends of the cylinder andthe plunger, whereby thesuction stroke is automatically effected merely by releasing the thumbat the end of the discharge stroke. Near one end the plunger is providedwitha protruding guide pin 21, which works against one side or the viewshowing the slot otherof a curved slot or guide 22 formedin thecorresponding'part of the cylinder. The Y sides of the slotare curved tosuch an extent that they will, through the pinabove referred to, causetheplunger during the working and suction strokes to turn alternately ina clockwise and counter-clockwise direction to such an extent astouncover the corresponding ports; The endof the plunger 17 is connectedto a working rod 23passing through a guide or gland24. The connectionbetween the working rod 23 and the plunger 17 is such that,although theplunger turns, the rod is restricted to a simple reciprocating motion.The end of the rod is provided with the usual thumb button 25, which isprefer ably made saucer-shaped to overcome the tendencythe thumb has ofslipping out'of position. I,

i The oil can operates as follows: 3

The thumb, button 25 is pressed in, and whenreleased theresultis thatthe plunger 17 moves backward under spring propulsion and in doing souncovers the intake ports 12 and 18 and sodraws oil into the cylinder 11andthe hollowplunger 17. When the thumb button is again pushed in, theworking stroke is made, which results in the discharge ports Band 19registering, and inthe oil nowu under pressure being delivered to thespout 16. The foregoing action is continued so long as theplunger isreciprocated.

It is'to benotedthat the guide pin 21 moves against one side of the slot220m, the working stroke, and against the other side on the suctionstroke. 1 From the foregoing it will be understood that the plunger17 isa combined sleeve valve and piston 'having'an oscillatory as well asreciprocating movement within its cylinder and such oscillatory movementbeing effected by means'of the slot and pin connection indicated by thenumerals 21 and 22. on the downward or working stroke of the plunger 17the pin 21 will be naturally forced against, the lower face of the slot22 whereby the port ways 19 formed within the plunger will register withthe discharge opening 13 for permittingtheoilto be forced from thecylinder, whereas upon the upward or suction stroke of the plunger 17this pin 21 will ride against the opposite or upper face of the slot 22whereby the port ways 18 of the plunger 17 will register with the inletport 12 of the cylinder and at the same time the port ways 19 of theplunger will be out of register with the outletport 13 of the cylinder.This slight displacement caused by a pin working in an enlarged slot 22causes the respective ports to be uncovered. and closed at the correcttime, which latter could not be effected by merely oscillating in ablock or counterclock-wise direction the sleeve valve or plunger as theport-ways therein would be uncovered on both strokes of the plunger andthe apparatus, accordingly, would be unworkable.

i From the foregoing description it will be obvious that in theapparatus there is really only one moving part, namely, the hollowplunger 17.

I claim p 1. In a force feed oil can, the combination of an oilreservoir, a cylinder having an inlet port communicatingwith said.reservoir and an outlet port whereby the oil may be forced therefrom, ahollow plunger mounted within said cylinder having port-ways thereinadapted at times to register with the inletand outlet ports ofsaidcylinder, meanswhereby said plunger may be reciprocated for drawingin and discharging the oil from said reservoir through said ports andmeans whereby upon each reciprocating movement of the said plunger thelatter will be caused to rotate and the port-ways thereof caused toregister with therespective ports of said 7 cylinder.

2. An 01]. can comprising in combination an oil reservo1r, a cylinderarranged therein having an inlet port and an outlet port, a

combined valve and piston mounted for simultaneous reciprocatory androtary motion within said cylinder, and said combined valve and pistonconsisting of a hollow sleeve having port-ways. therein whereby the portways of said sleeve will be caused to register with said'inlet andoutlet ports of the cylinder during the reciprocatory movement of saidhollow sleeve and upon rotation thereof.

3. An oil can comprising in combination an oil reservoir, a cylinderarranged therein having an inlet port and an outlet port formed in itsopposite sides, a combined valve and piston comprising a hollow sleevehaving port-ways arranged in its opposite sides adapted at times tocommunicate with the inlet and outlet ports of the cylinder, meanswhereby a combined reciprocatory and rotary movement may be transmittedto said 7 sleeve, whereby upon movement of said sleeve port-ways willcommunicate with the outlet port of said cylinder.

4. An oil can comprising in combination an oil reservoir, a cylinderarranged therein said cylinder having an inlet port at one side and anoutlet port at its opposite side, a combined valve and piston havingport-ways therein and adapted at times to register with said inlet andoutlet ports of the cylinder, said combined valve and piston comprisinga hollow sleeve, a coil spring arranged within said cylinder and adaptedtonormally retain said sleeve in one position, a working rod connectedto said sleeve whereby the latter may be forced in a direction oppositeto that which is caused by said coil spring, said cylinder having acurved slot formed therein, a pin carried by said sleeve and looselymounted within said slot whereby an oscillatory movement will betransmitted to said sleeve for causing the port-ways thereof to regis-

